Table 2.

Pre-rRNA and mature rRNA quantitation during E. coli growth phases

Time point (min)	OD600	CFU/ml	Ratea	Doublingb	Generation time (min)	rRNAc	Pre-rRNAc	Ratio	Growth phase
Overnight culture	2.307	6.67E + 09				6,009	2	2,720	Stationary phase
0	0	5.90E + 05				5,942	110	54	Lag phase
30	0	5.70E + 05				28,427	457	62
60	0.003	8.63E + 05	0.18	1.20	50.08	55,278	696	79	Log phase
90	0.008	2.30E + 06	0.43	2.83	21.19	78,741	970	81
120	0.024	6.20E + 06	0.43	2.86	21.00	91,049	1200	76
150	0.068	1.91E + 07	0.49	3.24	18.51	98,782	523	189
180	0.175	6.53E + 07	0.53	3.55	16.88	61,571	235	262
210	0.409	2.30E + 08	0.55	3.64	16.50	38,033	208	183
240	0.707	5.27E + 08	0.36	2.39	25.14	29,801	114	260	Early stationary phase
270	1.095	1.17E + 09	0.35	2.30	26.14	19,610	42	466
300	1.466	2.33E + 09	0.30	2.00	30.00	13,162	25	536
330	1.686	3.23E + 09	0.14	0.94	63.74	7,608	11	665	Stationary phase
360	1.834	4.43E + 09	0.14	0.91	65.87	5,734	8	723
390	1.957	5.03E + 09	0.06	0.37	163.81	4,899	7	706
420	2.051	5.73E + 09	0.06	0.38	159.68	6,230	6	1,049

^aGrowth rate in log units per 30 min.

^bDoublings per hour.

^cCopies per cell.